<template>
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollapse ? '64px' : '200px'">
      <el-menu
        unique-opened
        :collapse="isCollapse"
        :collapse-transition="false"
        router
        :default-active="activePath"
        background-color="#333744"
        text-color="#fff"
        active-text-color="#409FFF"
      >
        <!-- :unique-opened="true"->只允许展开一个菜单 -->
        <!-- :collapse-transition="false" -> 关闭动画 -->
        <!-- router -> 导航开启路由模式 -->
        <!-- 一级菜单  -->
        <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
          <!-- 一级菜单的模板区域 -->
          <template slot="title">
            <i :class="iconObj[item.id]"></i>
            <span>{{ item.authName }}</span>
          </template>
          <!-- 二级菜单 -->
          <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
            <!-- 导航开启路由模式：
              将index值作为导航路由 -->
            <!-- 二级菜单的模板区域 -->
            <template slot="title">
              <i class="el-icon-menu"></i>
              <span>{{ subItem.authName }}</span>
            </template>
          </el-menu-item>
        </el-submenu>
      </el-menu>
    </el-aside>
    <!-- 头部 -->
    <el-container>
      <el-header>
        <el-button type="primary" icon="el-icon-menu" size="mini" @click="togleCollapse" style="margin-left: 15px;"></el-button>
        <div class="r-content" style="margin-right: 20px;">
          <el-dropdown trigger="click" size="mini">
            <span class="el-dropdown-link" style="display: flex;align-items: center;justify-content: space-between;">
              <img src="../assets/image/user.png" class="user-avatar" />
              <i class="el-icon-caret-bottom" />
            </span>
            <el-dropdown-menu slot="dropdown">
              <el-dropdown-item >个人中心</el-dropdown-item>
              <el-dropdown-item>修改密码</el-dropdown-item>
              <el-dropdown-item divided @click.native="logout"><span style="display:block;">退出登录</span></el-dropdown-item>
            </el-dropdown-menu>
          </el-dropdown>
        </div>
      </el-header>
      <!-- 主体 -->
      <el-main>
        <!-- 内容主体 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menuList: [],
      iconObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      // 默认不折叠
      isCollapse: false,
      // 被激活导航地址
      activePath: ''
    };
  },
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem('activePath');
  },
  methods: {
    logout() {
      // 清空token
      window.sessionStorage.clear();
      this.$router.push('/login');
    },
    // 获取请求菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus');
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
      // console.log(res)
    },
    // 菜单的折叠与展开
    togleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    // 保存连接的激活地址
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath);
    }
  }
};
</script>

<style lang="less" scoped>
.el-container {
  height: 100%;
}

.el-icon-caret-bottom {
  cursor: pointer;
  position: absolute;
  right: -20px;
  top: 25px;
  font-size: 12px;
}

.el-header {
  background-color: #373f41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    img {
      height: 40px;
    }
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;

  .el-menu {
    border: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  // 鼠标放上去变成小手
  cursor: pointer;
}
.r-content {
  .user {
    width: 40px;
    height: 40px;
  }
}
</style>
